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        <li class="chapter " data-level="1.1" data-path="./">
            
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                    第 1 章 Kafka 概述
            
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        <li class="chapter " data-level="1.1.1" data-path="11-xiao-xi-dui-lie.html">
            
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                    1.1 消息队列
            
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                    1.2 为什么需要消息队列
            
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                    1.3 什么是 Kafka
            
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                    1.4 Kafka 架构
            
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                    第 2 章 Kafka 集群部署
            
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                    2.1 下载 Kafka
            
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                    2.2 部署
            
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                    2.3 Kafka 常用命令操作
            
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                    第 3 章 Kafka 工作流程分析
            
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                    3.1 Kafka 生产过程分析
            
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        <li class="chapter " data-level="1.3.2" data-path="di-3-zhang-kafka-gong-zuo-liu-cheng-fen-xi/32-broker-bao-cun-xiao-xi.html">
            
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                    3.2 broker 保存消息
            
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                    3.3 Zookeeper 存储结构
            
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                    3.4 Kafka 消费过程分析
            
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                    3.5 消费者组案例
            
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                    第 4 章 API 实战
            
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                    4.1 环境准备
            
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                    4.2 Kafka 生产者 API
            
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                    4.3 Kafka 消费者 API
            
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                    4.3.1 Kafka 消费者之高级 API
            
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                    4.3.2 Kafka 消费者之低级 API
            
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                    第 5 章 拦截器
            
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                    5.1 拦截器原理
            
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                    5.2 拦截器案例
            
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                    第 6 章 Kafka stream
            
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                    6.1 概述
            
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                    6.2 Kafka Stream 数据清洗案例
            
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                    第 7 章 扩展
            
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                    7.1 Kafka 和 Flume 比较
            
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                    7.2 Kafka 和 Flume 集成
            
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        <li class="chapter " data-level="1.7.3" data-path="di-7-zhang-kuo-zhan/73-kafka-pei-zhi-xin-xi.html">
            
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                    7.3 Kafka 配置信息
            
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                    7.3.1 broker 配置信息
            
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                    7.3.2 Producer 配置信息
            
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                    7.3.3 Consumer 配置信息
            
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                                <h1 id="52-&#x62E6;&#x622A;&#x5668;&#x6848;&#x4F8B;">5.2 &#x62E6;&#x622A;&#x5668;&#x6848;&#x4F8B;</h1>
<h2 id="&#x9700;&#x6C42;">&#x9700;&#x6C42;</h2>
<p>&#x5B9E;&#x73B0;&#x4E00;&#x4E2A;&#x7B80;&#x5355;&#x7684; 2 &#x4E2A; interceptor &#x7EC4;&#x6210;&#x7684;&#x62E6;&#x622A;&#x94FE;&#x3002;</p>
<ul>
<li><p>&#x7B2C; 1 &#x4E2A; interceptor &#x4F1A;&#x5728;&#x6D88;&#x606F;&#x53D1;&#x9001;&#x524D;&#x5C06;&#x65F6;&#x95F4;&#x6233;&#x4FE1;&#x606F;&#x52A0;&#x5230;&#x6D88;&#x606F; value &#x7684;&#x6700;&#x524D;&#x90E8;&#xFF1B;</p>
</li>
<li><p>&#x7B2C; 2 &#x4E2A; interceptor &#x4F1A;&#x5728;&#x6D88;&#x606F;&#x53D1;&#x9001;&#x540E;&#x66F4;&#x65B0;&#x6210;&#x529F;&#x53D1;&#x9001;&#x6D88;&#x606F;&#x6570;&#x6216;&#x5931;&#x8D25;&#x53D1;&#x9001;&#x6D88;&#x606F;&#x6570;&#x3002;</p>
</li>
</ul>
<p><img src="http://lizhenchao.oss-cn-shenzhen.aliyuncs.com/1541898790.png-atguiguText" alt=""></p>
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<h2 id="&#x5B9E;&#x4F8B;&#x64CD;&#x4F5C;">&#x5B9E;&#x4F8B;&#x64CD;&#x4F5C;</h2>
<h3 id="&#x65F6;&#x95F4;&#x62E6;&#x622A;&#x5668;">&#x65F6;&#x95F4;&#x62E6;&#x622A;&#x5668;</h3>
<pre class="language-"><code class="lang-java"><span class="token keyword">package</span> com<span class="token punctuation">.</span>atguigu<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>interceptor<span class="token punctuation">;</span>

<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerInterceptor<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerRecord<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>RecordMetadata<span class="token punctuation">;</span>

<span class="token keyword">import</span> java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>Map<span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TimeInterceptor</span> <span class="token keyword">implements</span> <span class="token class-name">ProducerInterceptor</span><span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token comment" spellcheck="true">/**
     * &#x8FD9;&#x4E2A;&#x65B9;&#x6CD5;&#x5728;key-value&#x88AB;&#x5E8F;&#x5217;&#x5316;&#x548C;&#x5206;&#x533A;&#x88AB;&#x5206;&#x914D;&#x4E4B;&#x524D;&#x8C03;&#x7528;.
     * &#x4E3B;&#x8981;&#x7528;&#x6765;&#x5BF9; ProducerRecord &#x8FDB;&#x884C;&#x4FEE;&#x6539;.
     * &#x8FD4;&#x56DE;&#x4FEE;&#x6539;&#x540E;&#x7684;&#x4E00;&#x4E2A;&#x65B0;&#x7684; ProducerRecord &#x5373;&#x53EF;
     *
     * @param record
     * @return
     */</span>
    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> ProducerRecord<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> <span class="token function">onSend</span><span class="token punctuation">(</span>ProducerRecord<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> record<span class="token punctuation">)</span> <span class="token punctuation">{</span>

        <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">ProducerRecord</span><span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span><span class="token punctuation">(</span>
                record<span class="token punctuation">.</span><span class="token function">topic</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
                record<span class="token punctuation">.</span><span class="token function">partition</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
                record<span class="token punctuation">.</span><span class="token function">key</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
                System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">&quot; : &quot;</span> <span class="token operator">+</span> record<span class="token punctuation">.</span><span class="token function">value</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">onAcknowledgement</span><span class="token punctuation">(</span>RecordMetadata metadata<span class="token punctuation">,</span> Exception exception<span class="token punctuation">)</span> <span class="token punctuation">{</span>

    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>

    <span class="token punctuation">}</span>

    <span class="token comment" spellcheck="true">/**
     * @param configs
     */</span>
    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">configure</span><span class="token punctuation">(</span>Map<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> <span class="token operator">?</span><span class="token operator">&gt;</span> configs<span class="token punctuation">)</span> <span class="token punctuation">{</span>

    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="&#x7EDF;&#x8BA1;&#x6D88;&#x606F;&#x7684;&#x62E6;&#x622A;&#x5668;">&#x7EDF;&#x8BA1;&#x6D88;&#x606F;&#x7684;&#x62E6;&#x622A;&#x5668;</h3>
<pre class="language-"><code class="lang-java"><span class="token keyword">package</span> com<span class="token punctuation">.</span>atguigu<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>interceptor<span class="token punctuation">;</span>

<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerInterceptor<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerRecord<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>RecordMetadata<span class="token punctuation">;</span>

<span class="token keyword">import</span> java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>Map<span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CountInterceptor</span> <span class="token keyword">implements</span> <span class="token class-name">ProducerInterceptor</span><span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> <span class="token punctuation">{</span>

    <span class="token keyword">private</span> <span class="token keyword">int</span> successCount <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
    <span class="token keyword">private</span> <span class="token keyword">int</span> failCount <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> ProducerRecord<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> <span class="token function">onSend</span><span class="token punctuation">(</span>ProducerRecord<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> record<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment" spellcheck="true">// &#x4E0D;&#x9700;&#x8981;&#x4FEE;&#x6539;&#x8BB0;&#x5F55;, &#x6240;&#x4EE5;&#x8981;&#x628A;&#x539F;&#x8BB0;&#x5F55;&#x8FD4;&#x56DE;, &#x5426;&#x5219;&#x5C06;&#x6765;&#x53D1;&#x9001;&#x7ED9; broker &#x7684;&#x90FD;&#x662F;null&#x4E86;</span>
        <span class="token keyword">return</span> record<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">onAcknowledgement</span><span class="token punctuation">(</span>RecordMetadata metadata<span class="token punctuation">,</span> Exception exception<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">if</span><span class="token punctuation">(</span>exception <span class="token operator">==</span> null<span class="token punctuation">)</span><span class="token punctuation">{</span>  <span class="token comment" spellcheck="true">// &#x53D1;&#x9001;&#x6210;&#x529F;</span>
            successCount<span class="token operator">++</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span><span class="token keyword">else</span><span class="token punctuation">{</span> <span class="token comment" spellcheck="true">// &#x53D1;&#x9001;&#x5931;&#x8D25;</span>
            failCount<span class="token operator">++</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;successCount = &quot;</span> <span class="token operator">+</span> successCount<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;failCount = &quot;</span> <span class="token operator">+</span> failCount<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token annotation punctuation">@Override</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">configure</span><span class="token punctuation">(</span>Map<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> <span class="token operator">?</span><span class="token operator">&gt;</span> configs<span class="token punctuation">)</span> <span class="token punctuation">{</span>

    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="producer-&#x4E3B;&#x7A0B;&#x5E8F;">Producer &#x4E3B;&#x7A0B;&#x5E8F;</h3>
<pre class="language-"><code class="lang-java"><span class="token keyword">package</span> com<span class="token punctuation">.</span>atguigu<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>interceptor<span class="token punctuation">;</span>

<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>KafkaProducer<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerConfig<span class="token punctuation">;</span>
<span class="token keyword">import</span> org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>kafka<span class="token punctuation">.</span>clients<span class="token punctuation">.</span>producer<span class="token punctuation">.</span>ProducerRecord<span class="token punctuation">;</span>

<span class="token keyword">import</span> java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>ArrayList<span class="token punctuation">;</span>
<span class="token keyword">import</span> java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>List<span class="token punctuation">;</span>
<span class="token keyword">import</span> java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>Properties<span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">InterceptorProducer</span> <span class="token punctuation">{</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span>String<span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment" spellcheck="true">// 1. &#x8BBE;&#x7F6E;&#x914D;&#x7F6E;&#x4FE1;&#x606F;</span>
        Properties props <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Properties</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;bootstrap.servers&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;hadoop201:9092&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;acks&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;all&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;retries&quot;</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;batch.size&quot;</span><span class="token punctuation">,</span> <span class="token number">16384</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;linger.ms&quot;</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;buffer.memory&quot;</span><span class="token punctuation">,</span> <span class="token number">33554432</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;key.serializer&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;org.apache.kafka.common.serialization.StringSerializer&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;value.serializer&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;org.apache.kafka.common.serialization.StringSerializer&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token comment" spellcheck="true">// 2. &#x6784;&#x5EFA;&#x62E6;&#x622A;&#x5668;</span>

        List<span class="token operator">&lt;</span>String<span class="token operator">&gt;</span> interceptors <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token operator">&lt;</span><span class="token operator">&gt;</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        interceptors<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;com.atguigu.kafka.interceptor.TimeInterceptor&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        interceptors<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">&quot;com.atguigu.kafka.interceptor.CountInterceptor&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        props<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">&quot;interceptor.classes&quot;</span><span class="token punctuation">,</span> interceptors<span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token comment" spellcheck="true">// 3. &#x521B;&#x5EFA;&#x751F;&#x4EA7;&#x8005;</span>

        KafkaProducer<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> producer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">KafkaProducer</span><span class="token operator">&lt;</span><span class="token operator">&gt;</span><span class="token punctuation">(</span>props<span class="token punctuation">)</span><span class="token punctuation">;</span>

        <span class="token comment" spellcheck="true">// 4. &#x53D1;&#x9001;&#x6D88;&#x606F;</span>

        <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">5</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            ProducerRecord<span class="token operator">&lt;</span>String<span class="token punctuation">,</span> String<span class="token operator">&gt;</span> record <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ProducerRecord</span><span class="token operator">&lt;</span><span class="token operator">&gt;</span><span class="token punctuation">(</span><span class="token string">&quot;first&quot;</span><span class="token punctuation">,</span> <span class="token string">&quot;hadoop&quot;</span> <span class="token operator">+</span> i<span class="token punctuation">)</span><span class="token punctuation">;</span>
            producer<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>record<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token comment" spellcheck="true">// 5. &#x5173;&#x95ED; Producer. &#x4E00;&#x5B9A;&#x8981;&#x5173;&#x95ED;Producer&#x5426;&#x5219;&#x4E0D;&#x4F1A;&#x8C03;&#x7528;Interceptor&#x7684;close&#x65B9;&#x6CD5;</span>
        producer<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="&#x6D4B;&#x8BD5;">&#x6D4B;&#x8BD5;</h3>
<p>&#x5728; kafka &#x4E0A;&#x542F;&#x52A8;&#x6D88;&#x8D39;&#x8005;&#xFF0C;&#x7136;&#x540E;&#x8FD0;&#x884C;&#x5BA2;&#x6237;&#x7AEF;java&#x7A0B;&#x5E8F;
<img src="http://lizhenchao.oss-cn-shenzhen.aliyuncs.com/1541903020.png-atguiguText" alt=""></p>
<p>&#x89C2;&#x5BDF; java &#x5E73;&#x53F0;&#x63A7;&#x5236;&#x53F0;&#x8F93;&#x51FA;&#x6570;&#x636E;</p>
<p><img src="http://lizhenchao.oss-cn-shenzhen.aliyuncs.com/1541902990.png-atguiguText" alt=""></p>
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